<?php
defined('IN_CMS') or die('Direct access to Script restricted.');

class sql_db
{
	private $db_connect_id;
	private $query_result;
	private $row = array();
	private $rowset = array();
	private $num_queries = 0;
	private $arr_queries = array();

	/**
	 * Constructor
	 *
	 * @param	string	$sqlserver
	 * @param	string	$sqluser
	 * @param	string	$sqlpassword
	 * @param	string	$database
	 * @param	bool	$persistency
	 * @return <type>
	 */
	public function __construct($sqlserver, $sqluser, $sqlpassword, $database, $persistency = false)
	{
		$this->persistency = $persistency;
		$this->user = $sqluser;
		$this->password = $sqlpassword;
		$this->server = $sqlserver;
		$this->dbname = $database;

		if($this->persistency)
		{
			$this->db_connect_id = @mysql_pconnect($this->server, $this->user, $this->password);
		}
		else
		{
			$this->db_connect_id = @mysql_connect($this->server, $this->user, $this->password);
		}

		if($this->db_connect_id)
		{
			if($database != "")
			{
				$this->dbname = $database;
				$dbselect = @mysql_select_db($this->dbname);

				if(!$dbselect)
				{
					@mysql_close($this->db_connect_id);
					$this->db_connect_id = $dbselect;
				}

				@mysql_query ("set character set 'utf8'", $this->db_connect_id);
				@mysql_query ("set names 'utf8'", $this->db_connect_id);
				//@mysql_query('set character set cp1251', $this->db_connect_id);
			}
			return $this->db_connect_id;
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @return <type>
	 */
	public function sql_close()
	{
		if($this->db_connect_id)
		{
			if($this->query_result)
			{
				@mysql_free_result($this->query_result);
			}
			$result = @mysql_close($this->db_connect_id);
			return $result;
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @param <type> $query
	 * @param <type> $transaction
	 * @return <type>
	 */
	public function sql_query($query = "", $transaction = FALSE)
	{
		// Remove any pre-existing queries
		unset($this->query_result);

		if($query != "")
		{
			$this->num_queries++;
			if (DEBUG == '1')
			{
				$this->arr_queries[count($this->arr_queries)] = $query;
			}
			$this->query_result = @mysql_query($query, $this->db_connect_id);
		}

		if($this->query_result)
		{
			unset($this->row[$this->query_result]);
			unset($this->rowset[$this->query_result]);
			return $this->query_result;
		}
		else
		{
			return ( $transaction == END_TRANSACTION ) ? true : false;
		}
	}

	/**
	 *
	 * @param <type> $query_id
	 * @return <type>
	 */
	public function sql_numrows($query_id = 0)
	{
		if(!$query_id)
		{
			$query_id = $this->query_result;
		}
		if($query_id)
		{
			$result = @mysql_num_rows($query_id);
			return $result;
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @return <type>
	 */
	public function sql_affectedrows()
	{
		if($this->db_connect_id)
		{
			$result = @mysql_affected_rows($this->db_connect_id);
			return $result;
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @param <type> $query_id
	 * @return <type>
	 */
	public function sql_numfields($query_id = 0)
	{
		if(!$query_id)
		{
			$query_id = $this->query_result;
		}
		if($query_id)
		{
			$result = @mysql_num_fields($query_id);
			return $result;
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @param <type> $offset
	 * @param <type> $query_id
	 * @return <type>
	 */
	public function sql_fieldname($offset, $query_id = 0)
	{
		if(!$query_id)
		{
			$query_id = $this->query_result;
		}
		if($query_id)
		{
			$result = @mysql_field_name($query_id, $offset);
			return $result;
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @param <type> $offset
	 * @param <type> $query_id
	 * @return <type>
	 */
	public function sql_fieldtype($offset, $query_id = 0)
	{
		if(!$query_id)
		{
			$query_id = $this->query_result;
		}
		if($query_id)
		{
			$result = @mysql_field_type($query_id, $offset);
			return $result;
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @param <type> $query_id
	 * @return <type>
	 */
	public function sql_fetchrow($query_id = 0)
	{
		if(!$query_id)
		{
			$query_id = $this->query_result;
		}
		if($query_id)
		{
			$this->row[(int)$query_id] = @mysql_fetch_array($query_id);
			return $this->row[(int)$query_id];
		}
		else
		{
			return false;
		}
	}
	
	/**
	 * 
	 * @param <type> $query_id
	 * @return <type>
	 */
	public function sql_fetchassoc($query_id = 0)
	{
		if(!$query_id)
		{
			$query_id = $this->query_result;
		}
		if($query_id)
		{
			$this->row[(int)$query_id] = @mysql_fetch_assoc($query_id);
			return $this->row[(int)$query_id];
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @param <type> $query_id
	 * @return <type>
	 */
	public function sql_fetchrowset($query_id = 0)
	{
		if(!$query_id)
		{
			$query_id = $this->query_result;
		}
		if($query_id)
		{
			unset($this->rowset[$query_id]);
			unset($this->row[$query_id]);
			while($this->rowset[$query_id] = @mysql_fetch_array($query_id))
			{
				$result[] = $this->rowset[$query_id];
			}
			return $result;
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @param <type> $field
	 * @param <type> $rownum
	 * @param <type> $query_id
	 * @return <type>
	 */
	public function sql_fetchfield($field, $rownum = -1, $query_id = 0)
	{
		if(!$query_id)
		{
			$query_id = $this->query_result;
		}
		if($query_id)
		{
			if($rownum > -1)
			{
				$result = @mysql_result($query_id, $rownum, $field);
			}
			else
			{
				if(empty($this->row[$query_id]) && empty($this->rowset[$query_id]))
				{
					if($this->sql_fetchrow())
					{
						$result = $this->row[$query_id][$field];
					}
				}
				else
				{
					if($this->rowset[$query_id])
					{
						$result = $this->rowset[$query_id][$field];
					}
					else if($this->row[$query_id])
					{
						$result = $this->row[$query_id][$field];
					}
				}
			}
			return $result;
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @param <type> $rownum
	 * @param <type> $query_id
	 * @return <type>
	 */
	public function sql_rowseek($rownum, $query_id = 0)
	{
		if(!$query_id)
		{
			$query_id = $this->query_result;
		}
		if($query_id)
		{
			$result = @mysql_data_seek($query_id, $rownum);
			return $result;
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @return <type>
	 */
	public function sql_nextid()
	{
		if($this->db_connect_id)
		{
			$result = @mysql_insert_id($this->db_connect_id);
			return $result;
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @param <type> $query_id
	 * @return <type>
	 */
	public function sql_freeresult($query_id = 0)
	{
		if(!$query_id)
		{
			$query_id = $this->query_result;
		}

		if ( $query_id )
		{
			unset($this->row[$query_id]);
			unset($this->rowset[$query_id]);
			@mysql_free_result($query_id);
			return true;
		}
		else
		{
			return false;
		}
	}

	/**
	 *
	 * @return <type>
	 */
	public function sql_error()
	{
		$result["message"] = @mysql_error($this->db_connect_id);
		$result["code"] = @mysql_errno($this->db_connect_id);

		return $result;
	}

	/**
	 *
	 * @return	int
	 */
	public function num_queries()
	{
		return $this->num_queries;
	}

	/**
	 *
	 * @return	array
	 */
	public function get_queries()
	{
		return $this->arr_queries;
	}
	
	/*
	 * Старт транзакции
	 */
	public function startTrans()
	{
	   /* $sql = "START TRANSACTION";
		$result = $this->sql_query($sql) or self::$obj_error->showMessageSQL(__FUNCTION__, basename(__FILE__), __LINE__);
		return $result;*/
	}
	
	/*
	 * подтверждение транзакции
	 */
	public function commTrans()
	{
	   /* $sql = "COMMIT";
		$result = $this->sql_query($sql) or self::$obj_error->showMessageSQL(__FUNCTION__, basename(__FILE__), __LINE__);
		return $result;*/
	}
	
	/*
	 * откат транзакции
	 */
	public function rollTrans()
	{
	   /* $sql = "ROLLBACK";
		$result = $this->sql_query($sql) or self::$obj_error->showMessageSQL(__FUNCTION__, basename(__FILE__), __LINE__);
		return $result;*/
	}
}
?>